title: The assay of haemagglutinin antigen content of split influenza vaccine by immunochemical methods.
mesh_terms: D006389:Hemagglutinins, Viral / Q000032:analysis*; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007252:Influenza Vaccines / Q000276:immunology*
chemical_list: D006389:Hemagglutinins, Viral; D007252:Influenza Vaccines